CN101005706A - Method and appliance for high speed channel access control - Google Patents
Method and appliance for high speed channel access control Download PDFInfo
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- CN101005706A CN101005706A CN200710005501.9A CN200710005501A CN101005706A CN 101005706 A CN101005706 A CN 101005706A CN 200710005501 A CN200710005501 A CN 200710005501A CN 101005706 A CN101005706 A CN 101005706A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/18—Negotiating wireless communication parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/18—Negotiating wireless communication parameters
- H04W28/22—Negotiating communication rate
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/54—Store-and-forward switching systems
- H04L12/56—Packet switching systems
- H04L12/5601—Transfer mode dependent, e.g. ATM
- H04L2012/5629—Admission control
- H04L2012/5631—Resource management and allocation
- H04L2012/5632—Bandwidth allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
Abstract
The method comprises: according to current load, controlling the accessing to the variable-rate multi-address connection system; the current load is used in determining the setting value of transmission rate; the setting value of transmission rate can contain maximal transmission rate and transmission probability; transmitting the setting value of transmission rate to the far end unit of the access system; the far end unit having data to be transmitted determines the desired transmission rate; if the desired transmission rate is equaling to or more than the maximal transmission rate, the far end unit will transmit data in maximal transmission rate by using the probability equaling to the transmission probability.
Description
The application is that the title of submitting on April 15th, 1999 is the U.S. Patent Application Serial Number 09/293 of " Method andApparatus forHigh Rate Channel Access Control ", 564 continuation application, this U.S. Patent application is laid-open U.S. Patents the 6th on May 20th, 2003 now, 567, No. 420.
Technical field
The present invention relates to communication system.The invention particularly relates to the resource allocation in the multiple access system.
Background technology
Fig. 1 is the example embodiment of land wireless communication system 10.Fig. 1 shows 12,13 and 15 and two base stations 14 of three far-end units.In fact, exemplary radio communication system has more far-end unit and base station.In Fig. 1, far-end unit 12 is shown as the mobile telephone unit of installing in automobile.Fig. 1 also shows fixed position far-end unit 15 in the wireless local loop system and the portable computer far-end unit 13 in the standard cellular system.In most of general embodiment, far-end unit can be the communication unit of any kind.For example far-end unit can be portable data units of portable PCS Personal Communications System (PCS) unit, personal digital assistant and so on or the fixed position data cell such as meter reading equipment.Fig. 1 show from the base station 14 to the forward link signal 18 of far- end unit 12,13 and 15 and from far- end unit 12,13 and 15 to the base station 14 reverse link signal 19.
In typical wireless communication system, such as shown in Figure 1, some base stations have a plurality of sectors.Multi-sector base stations comprises a plurality of independent transmission and reception antenna and some independent process circuit.Principle equivalent application discussed herein is in each sector of multi-sector base stations and the stand-alone base station of single sector.Therefore for following description, the sector of multi-sector base stations, a plurality of sectors or the single sector base stations relevant with public base station can be supposed to refer in term " base station ".
In cdma system, all base stations communicate in far-end unit use public frequency bandwidth and the system.Use a public frequency that system has been added flexibility and many advantages are provided.For example, use a public frequency bandwidth to make far-end unit from more than a base station receiving communication signal, and send the single signal that receives by more than a base station.The signal of far-end unit by using the difference of spread-spectrum CDMA waveform characteristic to receive simultaneously from different base stations.Similarly, the base station can be distinguished and respectively from a plurality of far-end unit received signals.
In wireless system, the maximization system is extremely important about the ability of handling the quantity of calling out simultaneously.If the power that receives in the base station from each far-end unit is in check like this: the Minimum Power Level arrival base station receiver that each signal needs to obtain the desired signal quality level has so just increased the system capability in the spread spectrum system.If the power level that the signal ether that is sent by far-end unit is low arrives base station receiver, signal quality will be reduced under the acceptable level so.On the other hand, if the high power level of far-end unit signal ether arrives, be acceptable with communicating by letter of this particular remote unit so, but high power signals can produce the interference to other far-end unit.Too much interference meeting influences and the communicating by letter of other far-end unit unfriendly.Thereby the far-end unit that generally is located adjacent to the base station sends low relatively signal power, and the far-end unit that is positioned the edge, overlay area sends big relatively signal power.
In more advanced system,, also control far-end unit and on reverse link, send used data transfer rate except the control far-end unit sends on reverse link the used power level.In order to be increased in the signal quality of base station received signal, the far-end unit that is positioned the edge, overlay area reduces it and sends used data transfer rate.By reducing data transfer rate, can increase the time of representing each, so just increased the energy of representing each and the performance that strengthens link.
Except link performance, the use of variable data rate also provides other benefit to system.For example, far-end unit can produce data flow, and it produces with the data transfer rate that significantly is lower than maximum data rate.In order to preserve power of remote unit and frequency spectrum resource, far-end unit can be selected to be lower than the rate sending data of maximum rate.In addition, some far-end units can be classified according to the service class that they provide.For example, preferable client computer far-end unit can provide the transfer of data that reaches maximum rate, yet the far-end unit of economic level can provide with 1/8 or half the transfer of data of maximum rate.Can lower power level send with the far-end unit that sends less than maximum rate, perhaps it sends portion of time.For example the far-end unit that sends with 1/4 maximum rate 1/4 the power that can send full rate signal necessity sends its signal.In addition, the far-end unit that sends with 1/4 maximum rate can about 1/4 duty ratio send.In either case, the far-end unit that compares rate transmission at full speed with the far-end unit that sends less than full rate produces littler interference and expends still less system resource, just vacates system resource thus and is used for other far-end unit.
If specified minimum acceptable signal quality, can under given interference level, calculate the upper limit of passing through the number of users of base station communication simultaneously so.This upper limit is commonly referred to extreme capacity.Actual user and the ratio of extreme capacity are defined as the load of system.Along with the approaching extreme capacity of actual user's number, load is just near 1.Load near 1 means the condition of system's latent instability.Unsettled condition can cause the performance of the degeneration of losing about error rate performance, handoff failure and connection.In addition, owing to load near 1, the size of base station coverage area can be shunk, even and make the user on the external margin of overlay area no longer can send enough power to communicate by letter with minimum available data rate with acceptable signal quality with the base station.
For these reasons, advantageously the use of restriction system can not surpass the designated ratio of extreme capacity so that load.In case being system loading, a kind of method of restriction system load reached predeterminated level with regard to the access of refusal to system.For example, if load is increased to more than 70% of extreme capacity, so favourable is exactly that refusal connects the request that produces and avoids accepting the existing switching that connects additional.In the system that far-end unit can send with a plurality of data transfer rates, the load of system also can be controlled by the data transfer rate that the control far-end unit sends.For the given level of load,, just can increase the sum of far-end unit that can connecting system by reducing the data transfer rate that each far-end unit sends.
In typical numerical data multiple access system, far-end unit is set up the communication session with the base station.This session maintenance activity is up to removing power from far-end unit or disconnecting up to the far-end unit request.In case set up session, far-end unit just sends the bursty data string.For example, if the far-end unit user is connected in the Internet by wireless connections and his notebook, when landing network, he has just set up session.If the far-end unit user produces email message, when far-end unit transmission of e-mail message, just produce the bursty data string.The bursty data string can comprise-one or more packets.Packet generally includes many data wireless links frames.
In the system of data transfer rate by base stations control of far-end unit, far-end unit sends before the bursty data string, and it sends to the base station inserting request message.Usually, insert request message and specify the desired data rate.In response, the base station can allow far-end unit to send, can allow the base station to send with lower data rate with desired data rate, maybe can refuse the access to system.Use such system to have some not enough.For example, use the access request message to expend valuable reverse link resources.In addition, the transmission of data, far-end unit and base station negotiate data transfer rate simultaneously on the meeting delayed backward link.In addition, by base station in response pick up from a plurality of far-end units the access request message the algorithm that must use complicated and expended considerable base station resource.
For these reasons, this industrial circle needs the method and apparatus of a kind of control to the access of the multiple access system of use variable data rate delivery plan for a long time.
Summary of the invention
Use the rl transmission rate that is used for far-end unit in the corresponding overlay area of base stations control.Base station monitoring reverse link load and dynamic adjustments transfer rate set point.The transfer rate set point can be according to maximum transfer rate and transmission probability definition.Maximum transfer rate defines the maximum reverse link data rates that can be used for far-end unit.The probability that uses transmission probability control far-end unit to send with given maximum transfer rate.The base station can be to far-end unit broadcast transmitted rate set point.Far-end unit at any time can the speed lower than maximum transfer rate send.Use this method, with effectively utilize free system resources fast and the load of stable manner control system.
Description of drawings
From below in conjunction with the detailed description of accompanying drawing, it is more obvious that characteristics of the present invention, purpose and advantage will become:
Fig. 1 is the example embodiment of land wireless communication system.
Fig. 2 is the flow chart of explanation base station operation.
Fig. 3 is the flow chart that the operation of example far-end unit is shown.
Fig. 4 illustrates the block diagram that uses in conjunction with example wireless system of the present invention.
Embodiment
In having the multiple access system of limited resources, need control the device of reverse link load for fear of unsettled system condition.In the system that far-end unit can send with a plurality of data transfer rates, can be by regulating the data transfer rate control reverse link load that far-end unit sends.For example, externally and mutually interference level allows 30 far-end units with given data transfer rate simultaneously in the system of connecting system, if each far-end unit with half transmission of given data transfer rate, same system can allow 60 far-end units connecting systems simultaneously so.If the segment distal unit sends with half of given data transfer rate, system can hold the number of users between 30 and 60 simultaneously so.Under the practical operation condition, the capacity of system is soft ways to restrain, and each far-end unit that wherein adds system to has reduced each other system user and operated residing signal quality.This capacity still is the function of time, wherein except also having interference time to time change from far-end unit from the source, and the load of appreciable impact system.If owing to advantageously avoided load to surpass the caused catastrophic failure of heap(ed) capacity, thus usually system operator load limit the expection capacity limit 60% and 75% between.
For the load limit on the reverse link in specified level, just need to measure the reverse link load.The reverse link load of base station is not only the function of the far-end unit of operation in the base station coverage area.And reverse link load or the function that disturbs from other source.The base station front-end noise itself is exactly huge interference source.In addition, other far-end unit that is operated near the base station coverage area on the same frequency also can cause huge interference.The associating Application No. of submitting on October 28th, 1,998 09/181345 co-pending (is a laid-open U.S. Patents numbers 6 on August 5th, 2003 now, 603,745) be entitled as the apparatus and method that disclosed a kind of definite load in the patent application of " METHOD AND APPARATUS FORREVERSE LINK OVERLOAD DETECT10N ", it has transferred assignee of the present invention and incorporated herein by reference.The method of various definite loads can be used in combination with the present invention.
According to the present invention, in order to control the data transfer rate that a plurality of base stations send, the measurement of loading on the reverse link is adopted in the base station.In typical multiple access system, the base station sends auxiliary channel as a rule.Auxiliary channel carries the information that is received by a plurality of far-end units.Auxiliary channel carries the information about system operation, such as near the identification of base station, the availability of some service and the identification of system operator.According to one embodiment of present invention, except the standard supplementary, the base station also sends the transfer rate set point.Far-end unit is from auxiliary channel retrieval set point information and use it to determine the speed of its transmission.
In one embodiment, according to maximum transmission data rate and transmission probability definition transfer rate set point.The maximum transfer rate definition is used for the maximum reverse link data rates of far-end unit.Transmission probability is used to control the probability that far-end unit sends with given maximum transfer rate.Far-end unit can the speed lower than maximum transfer rate send at any time.
For the ease of effective using system resource,, advantageously make system as much as possible near capacity limitation work from the corresponding probability viewpoint of time-dependent system condition.According to the present invention, but, system loading just slowly increases the transfer rate set point as long as remaining in the maximum permissible load., so just reduce the transfer rate set point if but the actual load of system surpasses the maximum permissible load.
In one embodiment, but as long as the load of system remains on below the maximum permissible load, just slowly increase transmission probability.When transmission probability surpasses 1, just the maximum transmission data rate is increased to next higher available horizontal and reduces transmission probability.Use this method, but the transfer rate set point will increase slowly up to load and reaches the maximum permissible load.If free system resources is enough supported the needs of all far-end units, so just increase the transfer rate set point up to transmission probability equal 1 and maximum transfer rate equal the maximum data rate.If free system resources is not enough to allow each far-end unit to send with its expected rate, slowly increase owing to the transfer rate set point so, but load will surpass the maximum permissible load gradually., just reduce the transfer rate set point in case but load surpasses the maximum permissible load.If it is constant that demand keeps, system will reach balance, and wherein the transfer rate set point approximates maximum and can allow the transfer rate set point.For example, if, so just maximum transfer rate is set at half full rate, and transmission probability can be less than 1 to the demand height of system.
In preferred embodiment, minimum possibility transfer rate set point is defined as maximum transfer rate and equals lowest data rate, and transmission probability equals 1.Therefore, even under maximum load condition, make also that to have each far-end unit of being connected can be 1 to send with minimum speed limit with probability.In order to keep the stability of a system, if but surpass the maximum permissible load for a hour load when the transfer rate set point, so just need refuse additional remote unit connecting system.
An operational benefit according to the present invention is exactly to be convenient to relatively realize at the transmission control procedures of base station.Only use the transfer rate set point is determined in the single input of this process.In one embodiment, the transfer rate set point of only being made up of two numbers is only output.Individually respond when having data to send whenever far-end unit from the art methods of the accidental access request message of each far-end unit and compare, operation pipeline change of the present invention.Operation is not according to about using such as active user's quantity or prospective users or the input of factor the amount of far-end unit in a certain class.In addition, operation does not need the mass data storage to store about the recent relevant information of entering of far-end unit that allowed.
Fig. 2 is the flow chart of explanation base station operation.Operation starts from beginning frame 30.In frame 32, be the specification of variables that is used for this process initial value.Transmission probability is set at 1 and maximum transfer rate is set at lowest data rate so that the transfer rate set point is set at its minimum value.In example system, lowest data rate is 1/8 full rate.
In frame 32, fall off rate " Δ
TP" and climbing speed " δ
TP" be set at nominal level.In example system, fall off rate and climbing speed are according to current maximum transfer rate.For example sending in the system of data Δ with 1/8 full rate, 1/4 full rate, half full rate and full rate
TPValue can be respectively 1/2,1/4,1/8 and 1/16.In typical environment, δ
TPValue less than Δ
TPValue.For example, in described system just now, for each data transfer rate δ
TPValue be Δ
TPValue 1/16.
But frame 34 is determined load and whether has been surpassed the maximum permissible load.If not, flow process continues to arrive frame 36, wherein transmission probability is increased δ
TPFlow process continues to arrive frame 38, and it determines whether that transmission probability surpasses 1.In this case, transmission probability is set at 1 and increase δ at frame 36 at frame 32
TPValue, thus transmission probability just surpass 1 and flow process proceed in the frame 40.Frame 40 determines whether the maximum transmission data rate equals the maximum data rate.Therefore in this example, in frame 32, the maximum transmission data rate is set at minimum speed limit, is not equal to maximum data rate and flow process continues in the maximum transmission data rate in frame 42.In frame 42, maximum transfer rate is set at next the maximum data rate.For example, in system, the maximum transmission data rate is set at 1/4 full rate with four data transfer rates.In frame 44, the transmission probability value subtracts 1.Flow process continues to arrive frame 48, wherein suspends this process and waits for following one-period.
Compare with the generation that inserts request message before each transmission, also simplified the operation in the far-end unit.According to the present invention, far-end unit is selected the desired data rate.The criterion of various definite desired data rate and method can be used in combination with the present invention.For example, the definite of desired data rate can consider the data volume of transmit queue, the available transmit power that is exclusively used in higher data, user institute requested service classification or the emergency level relevant with transmission.The additional information of selecting about desired data rate can number be 5 in laid-open U.S. Patents on June 28th, 1999,914,950 are entitled as in the patent of " METHOD AND APPARATUS FOR REVERSE LINK DATA RATESCHEDULING " and find, and it has transferred assignee of the present invention.As long as desired data rate is less than the maximum transfer rate that receives from the base station, far-end unit just sends with desired data rate.If desired data rate equals or exceeds maximum transfer rate, far-end unit just sends with maximum transfer rate with the probability that equals transmission probability.If far-end unit does not send with maximum transfer rate, it just transfers to send than low rate with next so.In this way, in the ordinary course of things, the number of users that sends with maximum transfer rate and expectation with maximum transfer rate or more the ratio of the of a sort far-end unit number that sends of high transmission rates on average equal transmission probability.In this way, can be effectively and using system resource liberally.
If far-end unit carries out soft handover with one or more base stations, it can be from receiving the transfer rate set point more than a base station so.Far-end unit can use the minimum transfer rate set point that receives from any one base station of carrying out with it soft handover.The minimum speed limit set point can be determined by transmission rate set point of specifying the minimum speed limit set point or the transmission rate set point (if maximum transfer rate equates) with minimum transmission probability.In addition, far-end unit can use the flank speed set point, and perhaps it can be on average or makes up two transfer rate set points in addition.
Fig. 3 is the flow chart of initial routine far-end unit operation.Flow process starts from frame 70.In frame 72, far-end unit is determined its desired data rate.In case determined desired data rate, flow process just proceeds in the frame 74.Frame 74 determines that whether desired data rate is less than the maximum transmission data rate that receives recently.As noted above, far-end unit can be monitored the auxiliary channel of the currency of transfer rate set point.If desired data rate is less than maximum data rate, far-end unit just is set at desired data rate to transmission data rate in frame 82 so.In frame 86, system uses the transfer rate of just having determined up to definite new value.If desired data rate surpasses or equals maximum transfer rate, flow process continues to arrive frame 76 from frame 74 so.In frame 76, far-end unit produces random number.In preferred embodiment, random number value between 0.00 and 0.99.Frame 78 determines that whether random number is less than the transmission probability that receives recently.If just in frame 80, transfer rate is set at maximum transfer rate.If not, just frame 84 transfer rate be set at be lower than maximum transfer rate next than low transfer rate.In either case, flow process continues to arrive frame 86.
According to the present invention, from the transfer rate generation of transfer of data to set in frame 80,82 or 84 of far-end unit.In this way, send the access request message and do not consume reverse chain-circuit capacity.In addition, insert the not transmission of delayed backward link data of request process.
An advantage of the present invention flexibility that to be exactly it provide for the system manager is with the operation of control system.For example, along with the increase of system loading, the probability of time-dependent system condition has also increased.Like this, but the probability of time-dependent system condition just depends on maximum permissible load value.But system operator is controlled the probability of calamitous system break by simple change maximum permissible load value to expend average size in order to satisfy its current criterion.
In addition, be that the high-priority users that sends outside the restriction that provides by the transfer rate set point is provided if system operator wants to allow some far-end unit, he can do like this and need not to do any variation to inserting control procedure.In this case, the process operation by nature reduces the transfer rate set point of system so that these users are made compensation.For example preferable user can be always with being 1 transmission probability rate or with the maximum transfer rate connecting system at full speed, increase load thus to system.The present invention compensates this condition by the transfer rate set point that reduces the lower priority unit, and does the existence that need not to know high-priority users in the system like this.In addition, the system manager can control Δ
TPAnd δ
TPValue to change the operating characteristic of system.
Fig. 4 is the block diagram that the example wireless system of using in conjunction with the present invention is shown.System comprises base station 114 and far-end unit 100.Base station 114 can be positioned near its corresponding overlay area, and perhaps some parts in the base station 114 can be positioned at far-end.Base station 114 receives wireless link signals by antenna 116.Receiver 118 is used for wireless link signals is converted to digital bit stream.In addition, receiver 118 provides and determines that to loading the output of processing unit 120, this unit are used for determining the preload of working as of system.The output of load being determined processing unit 120 is delivered to access control processing unit 122, and it provides many Core Features of the present invention.For example, access control unit 122 can comprise the processing of step shown in a plurality of execution graphs 2.The output that inserts processing unit 122 is the transfer rate set point that is delivered to controller 126.Controller 126 can monitor total operation of base station.In one embodiment, controller is combined in the transfer rate set point in the assistance messages and it and is delivered to transmitter 124.Transmitter 124 produces wireless link signals and it is delivered to antenna 116 to send to a plurality of far-end units that comprise far-end unit 100 by Radio Link.
Generally, far-end unit 100 can be maybe to be coupled in any kind terminal that produces digital information.For example, far-end unit can be maybe to be coupled in individual notebook, printer, testing equipment, server, video terminal or various miscellaneous equipment.Far-end unit 100 comprises controller 102, and it monitors the operation of far-end unit 100.In the embodiment shown in fig. 4, controller 102 is from the unit receiving digital data of separate housings.Controller also receives the data that produce from the wireless link signals that receives by antenna 110 from receiver 104.The data extract transfer rate set point that controller 102 receives from receiver 104 also is delivered to speed to it and determines processing unit 106.Speed is determined processing unit 106 definite current transfer rates.For example, speed determines that processing unit 106 can have a series of processing of carrying out operation shown in Figure 3.Current transfer rate is used for transmitter 108 by antenna 110 data are sent to base station 114.
Various alternative according to the invention all knows better for those skilled in the art.For example, referring again to Fig. 2, is not to subtract 1 from the transmission probability value in frame 44, but transmission probability is set at 0 or some fractional values.Similar, not that the transmission probability value is added 1 in frame 60, but transmission probability is set at 1 or close 1.In the example shown in above, operation comprises four different data transfer rates.Can use greater or lesser transfer rate numerical value according to the present invention.Though the description here is about digital data system, this principle can directly apply to the many variable bit rates system that comprises voice system.
In the example embodiment shown in above, Δ
TPAnd δ
TPValue be to depend on maximum transfer rate.In other embodiments, they can be fixed in whole operation, perhaps can be dependent on some other variablees.Though using to system of auxiliary channel provides validity, can on dedicated channel, be sent to far-end unit to the transfer rate set point according to the present invention.
Transmission probability can adopt one of various forms.In above example, what transmission probability reflected is the probability that far-end unit sends with maximum transfer rate.In addition, sending probability can reflect that far-end unit is to be lower than next probability that sends than low rate of maximum transfer rate.For transmission probability is applied restriction, above example uses random number to take place.In order to apply restriction, can use the various methods that other is known and develops afterwards.
The present invention can other particular form implements and does not leave its purport and essential feature.To consider described embodiment in all fields, they just as an illustration property but not see reality, therefore scope of the present invention be represent by appended claims rather than by above description.The all changes that meet claims meaning of equal value and scope are included in its scope.
Claims (4)
1. a control may further comprise the steps the method for the access of system:
Receive the load indication of reflection with respect to the current system use of the upper limit;
If described load indication then increases the transfer rate set point that is used to regulate to the access of described system less than allowing restriction; With
If described load indication limits greater than described the permission, then reduce described transfer rate set point, wherein, described transfer rate set point comprises maximum transfer rate and transmission probability,
Wherein, the described step that increases described transfer rate set point comprises the step that makes described transmission probability increase by first amount,
Wherein, the described step that reduces described transfer rate set point comprises the step that makes described transmission probability reduce second amount, and wherein, described first amount and described second amount depend on described maximum transfer rate.
2. a control may further comprise the steps the method for the access of system:
Receive the load indication of reflection with respect to the current system use of the upper limit;
If described load indication then increases the transfer rate set point that is used to regulate to the access of described system less than allowing restriction; With
If described load indication limits greater than described the permission, then reduce described transfer rate set point, wherein, described transfer rate set point comprises maximum transfer rate and transmission probability,
Wherein, the described step that increases described transfer rate set point comprises the step that makes described transmission probability increase by first amount,
Wherein, the described step that reduces described transfer rate set point comprises the step that makes described transmission probability reduce second amount, and wherein, the described step that increases described transfer rate set point comprises if described transmission probability surpasses 1 then increase the step of described maximum transfer rate.
3. a control may further comprise the steps the method for the access of system:
Receive the load indication of reflection with respect to the current system use of the upper limit;
If described load indication then increases the transfer rate set point that is used to regulate to the access of described system less than allowing restriction; With
If described load indication limits greater than described the permission, then reduce described transfer rate set point, wherein, described transfer rate set point comprises maximum transfer rate and transmission probability,
Wherein, the described step that increases described transfer rate set point comprises the step that makes described transmission probability increase by first amount,
Wherein, the described step that reduces described transfer rate set point comprises the step that makes described transmission probability reduce second amount, and wherein, the described step that reduces described transfer rate set point comprises if described transmission probability is lower than 0 then reduce the step of described maximum transfer rate.
4. access control equipment comprises:
Receiver, it is suitable for from can be with a plurality of user's received signals more than a rate sending data;
The load determining unit, the indication that it is coupled in described receiver and is used to produce system loading; With
The access control processing unit, it is used to receive the indication of described system loading and produces the transfer rate set point sending to described a plurality of user,
Wherein, described access control processing unit comprises the processing by determining that maximum transfer rate and transmission probability produce described transfer rate set point, wherein, if described access control processing unit comprises described load surpass can the permission level then reduce the processing of described transmission probability and described transmission probability and be lower than 0 then described maximum transfer rate is reduced to next processing than low transfer rate.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/US2000/013692 WO2001089257A1 (en) | 2000-05-17 | 2000-05-17 | Method and apparatus for transmission rate modification of communication channels |
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|---|---|---|---|
| CNB008196796A Division CN1310557C (en) | 2000-05-17 | 2000-05-17 | Method and apparatus for transmission rate modification of communication channels |
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| CN101005706A true CN101005706A (en) | 2007-07-25 |
| CN100569004C CN100569004C (en) | 2009-12-09 |
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| CN200710005501.9A Expired - Lifetime CN100569004C (en) | 2000-05-17 | 2000-05-17 | The method and apparatus that is used for the high speed channel access control |
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| JP3629008B2 (en) | 2002-04-19 | 2005-03-16 | 松下電器産業株式会社 | Data receiving apparatus and data distribution system |
| US7551588B2 (en) * | 2003-03-06 | 2009-06-23 | Nortel Networks Limited | Autonomous mode transmission from a mobile station |
| US8254358B2 (en) | 2003-03-06 | 2012-08-28 | Ericsson Ab | Communicating a broadcast message to change data rates of mobile stations |
| CN1792110B (en) * | 2003-03-15 | 2012-06-20 | 爱立信股份有限公司 | Communicating a broadcast message to change data rates of mobile stations |
| AU2003266485A1 (en) * | 2003-09-16 | 2005-04-06 | Utstarcom (China) Co. Ltd. | A method for controlling a wireless access based on multi-services priority in umts |
| BRPI0510686A (en) * | 2004-05-07 | 2007-12-26 | Koninkl Philips Electronics Nv | method of operating a communication system, first station and second station for use in a communication system, and, communication system |
| EP1696616A1 (en) * | 2005-02-28 | 2006-08-30 | NTT DoCoMo, Inc. | Transmission rate control method, mobile station, and radio network controller |
| CN100446582C (en) * | 2005-03-23 | 2008-12-24 | 华为技术有限公司 | Method for allowing information quantity management |
| JP4789609B2 (en) * | 2005-12-07 | 2011-10-12 | 京セラ株式会社 | Radio base station, radio communication terminal, radio communication method, and radio communication system |
| US10674516B2 (en) | 2014-01-30 | 2020-06-02 | Nokia Technologies Oy | Load control system for device to device discovery signal transmissions |
| CN104158572B (en) * | 2014-06-27 | 2017-10-13 | 河海大学 | A kind of green distributing antenna system communication means based on smart antenna |
| CN109362089B (en) * | 2018-09-28 | 2021-10-12 | 深圳大学 | Performance evaluation method and system of wireless energy transmission communication network |
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| FI107575B (en) * | 1994-06-20 | 2001-08-31 | Nokia Mobile Phones Ltd | Communication method, base station and subscriber terminal |
| GB9509921D0 (en) * | 1995-05-17 | 1995-07-12 | Roke Manor Research | Improvements in or relating to mobile radio systems |
| DE69636918T2 (en) * | 1995-09-20 | 2007-12-06 | Ntt Mobile Communications Network Inc. | Access method, mobile station and base station for CDMA mobile communication system |
| AU708348B2 (en) * | 1996-03-18 | 1999-08-05 | General Instrument Corporation | Dynamic bandwidth allocation for a communication network |
| TW317058B (en) * | 1996-04-23 | 1997-10-01 | Ibm | Data communication system for a wireless access to an atm network |
| US6046981A (en) * | 1997-02-28 | 2000-04-04 | Nec Usa, Inc. | Multi-class connection admission control method for Asynchronous Transfer Mode (ATM) switches |
| US5914950A (en) | 1997-04-08 | 1999-06-22 | Qualcomm Incorporated | Method and apparatus for reverse link rate scheduling |
| US6307867B1 (en) * | 1998-05-14 | 2001-10-23 | Telefonaktiebolaget Lm Ericsson (Publ) | Data transmission over a communications link with variable transmission rates |
| US6603745B1 (en) | 1998-10-28 | 2003-08-05 | Qualcomm Incorporated | Method and apparatus for reverse link overload detection |
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| EP1583386A1 (en) | 2005-10-05 |
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| WO2001089257A1 (en) | 2001-11-22 |
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